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28 February 2006 AGE-NC Project No. 06-1390 Page 5 of 6 equipped with 1.25-inch probing rods. The Geoprobe advances soil probe borings using a hydraulic hammer to drive soil sampling tools to specified depths. 4.2. SOIL SAMPLING COLLECTION AND ANALYSIS The soil boring will be sampled at discreet five-foot intervals using a 1.125"Geoprobe soil sampling assembly loaded with four six-inch brass sleeves. Upon sample retrieval, the ends of the second sleeve will be covered with Teflon sheets, capped and sealed with tape. Appropriately sealed and labeled samples will be placed in a chilled container under ice and transported under chain-of-custody procedure to aDHS-certified laboratory.Each sample sleeve will be labeled with the boring designation, depth, time, date and sampler's initials. Soils encountered in the borings will be visually classified by an AGE geologist in accordance with the Unified Soil Classification System(USCS).Additionally,soil samples will be field-screened for the presence of volatile organic compounds using an organic vapor meter(OVM), equipped with photo-ionization detector(PID). 4.3. GRAB GROUND WATER SAMPLING PROCEDURES For the collection of a grab ground water sample, the boring will be advanced to the top of the ground water table as identified by collection of a saturated soil sample.Once ground water has been encountered,a Geoprobe push-driven water sampling device will be advanced two to three feet into the water-bearing zone. The grab ground water sample will be collected using a Geoprobe water sampling assembly fitted with a pre-cleaned,one-inch diameter 0.01-slotted temporary well screen. The ground water sample will be extracted by lowering a polyethylene bailer through the hollow center of the push rods into the screen section. Appropriately sealed and labeled samples will be placed in a chilled container under ice and transported under chain-of-custody procedure to a DHS-certified laboratory.Each sample container will be labeled with the boring designation, time, date and sampler's initials. 4.4. EQUIPMENT DECONTAMINATION Prior to use,all sampling tools used for sample collection will be thoroughly rinsed with clean water after being washed with a solution of Alconox. All probing rods will be cleaned prior to advancement at each probe boring location. Advanced GeoEnvironmental,Inc.